1. The Samsung pattern, repeating quietly in your stack.
In 2023 Samsung engineers pasted internal source code into ChatGPT, the snippets showed up in OpenAI's training pipeline, and Samsung banned the tool internally. The headline was the ban. The lesson the rest of the industry took home was the leak. Three years later, every engineering org has Copilot, Cursor, or Claude Code wired into the IDE, and the volume of code crossing the wire is orders of magnitude higher than what Samsung's incident exposed. The leak surface is not the question. The audit trail is. If a regulator asks tomorrow which lines of your monorepo were sent to which provider in Q1, the honest answer for almost every engineering org is "we cannot reconstruct it."